Two-node architecture

THE FUTURE OF STREET LIGHTING LIT RIGHT

As an industry leader in the development of two-node architecture, TE Connectivity (TE) provides an extensive portfolio of flexible and reliable solutions for smart street lighting systems.

What are the benefits of two-node architecture?

The concept of smart cities has been discussed for many years, and technology advancements are beginning to bring the idea closer to reality. The Zhaga-D4i ecosystem is the backbone of this movement, as it is a cost-effective way for widespread development and deployment of smart city sensors and technologies, eliminating the need for one organization to provide the end to end solution. Different parties can provide products matching their expertise; luminaire manufacturers can provide luminaires, photocell manufacturers photocells, and sensor manufacturers sensor nodes. Modernizing street lighting architecture with two-node luminaries and smart controllers can deliver significant benefits for cities, municipalities, and utility companies.

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The Growing Importance of Two-Node Architecture in Street Lighting

Hear from TE Connectivity experts as they dive into two-node architecture technology and its role in advancing the lighting industry.

The Growing Importance of Two-Node Architecture in Street Lighting

Hear from TE Connectivity experts as they dive into two-node architecture technology and its role in advancing the lighting industry.

Advancing Innovation in Street Lighting Control Nodes

Join TE engineers Alex King and Jonathan Catchpole as they discuss how the LUMAWISE Endurance N Enhanced Base can help you bring your streetlighting control node to market faster, with greater reliability, and fewer engineering resources.

Advancing Innovation in Street Lighting Control Nodes

Join TE engineers Alex King and Jonathan Catchpole as they discuss how the LUMAWISE Endurance N Enhanced Base can help you bring your streetlighting control node to market faster, with greater reliability, and fewer engineering resources.

Zhaga Book 18 Standard

In 2010 Zhaga, a global lighting industry consortium, was formed to standardize LED component interfaces in luminaires. Recently, their mission has expanded to include interoperability of components. In partnership with The DALI Alliance, they have developed the D4i protocol and the Zhaga-D4i certification program for IoT-ready lighting fixtures. The Zhaga Book 18 Standard and the Zhaga-D4i certification was designed specifically for LED lighting and differs from ANSI C136.41 in that the PSU is incorporated into the luminaire instead of the photocontrol, either as part of the LED driver or separately. This simplifies the wiring of the lighting fixture’s control nodes, and the digital communication protocol allows for two-node architecture.

 

The two-node architecture incorporates an upward-facing node, to house a photocell or communication node, and a second node for motion or other sensor types for which a downward viewing angle is appropriate. The communication bus is designed specifically for the D4i protocol. The sensor nodes themselves are smaller and easier to seal against ingress from dust and precipitation. With a new generation of interchangeable drivers, Zhaga expands the capabilities of outdoor lighting fixtures to act as a platform for sensors and communication devices. In the future, we expect to see sensors for vehicles or pedestrian counting, traffic reporting, pollution detection, and other purposes.

CAD of Zhaga Book 18, Dual-Node Architecture

(1) Control Device – Zhaga-D4i Certified; (2) Zhaga Book 18 Interface; (3) Auxiliary Power; (4) Built-In Auxiliary Power Supply Unit (PSU); (5) LED Driver; (6) Light Emitting Diode (LED) Module; (7) D4i Communication Bus; (8) Zhaga Book 18 Interface; (9) Control Device – Zhaga-D4i Certified.

Zhaga/ANSI

Hybrid Two-Node Architecture

The hybrid two-node architecture leverages the dominance of ANSI C136.41 while taking advantage of the simplicity and open architecture of Zhaga-D4i. In this configuration, the upward-facing node is a photocontrol or communication node connected by a 7-pole ANSI C136.41 interface that does not switch the grid power to the LED driver. The downward-facing node is a sensor input device, such as a motion sensor. Both nodes and the entire luminaire are certified to Zhaga-D4i.

 

The ANSI C136.41 node can be powered from an auxiliary PSU, internal or external to the driver. The resulting light fixture design has simplified wiring and architecture and creates infrastructure to facilitate smart cities with Zhaga Book 18 sensors and digital communications protocol.

CAD of Zhaga/ANSI Hybrid 2-Node Architecture

(1) Control Device – Zhaga-D4i Certified; (2) Photodiode; (3) Wireless Communication to the Cloud; (4) Power Supply from Grid – Not Switched; (5) ANSI C136.41 Interface; (6) Auxiliary Power; (7) Built-In Auxiliary Power Supply Unit (PSU); (8) LED Driver; (9) Light-Emitting Diode (LED) Module; (10) D4i Communication Bus; (11) Zhaga Book 18 Interface; (12) Control Device – Zhaga-D4i Certified.

Authors

  • Jonathan Catchpole, Principal Systems Architect
  • Scott Hamilton, Sr. Manager, Product Management
  • Alexander Hunt III, Product Manager

 

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